Have a job tying in a big chiller. They moved out the old one and brought in a new one. There are 2 sets of 3" emt fed from overhead with (3) 500 MCM in each conduit and a ground in each one. I'm going to have to shorten the pipe overhead and re-feed them down to the new chiller. There are no supports right before it will have to go into the new chiller. I got some 3/8 rod and plan on using some unistrut to hold it, but am having a problem getting the right anchor bolt to go into the concrete overhead. I got a 3/8 sleeve type bolt and some 3/8" rod couplings, but the problem is the threaded part of the sleeve is 5/16" and the coulplings won't fit. I normally don't do this big stuff, but got the job through a friend. Any advise from you commercial and industrial guys would be greatly appreciated. Thanks a lot. Steve...